Physics- Motion in two dimensions problem?

Question

I am probably making this harder then it is but here:

A ball rolls with a constant velocity across a tabletop 0.950m high. It rolls off and hits the ground 0.352m horizontally from the edge of the table. How fast was the ball rolling when it left the table?

I need to know how you arrive at the answer, not just the answer, thanks.

Answer 1

From s = at^2 calculate how long it takes for a ball to fall from height of 0.950m. Then take the horizontal distance 0.352m and divide by the time.

The horizontal motion of the ball does not affect how fast it falls.